Carbureter for hydrocarbon-engines.



. No. 785,622. PATENTBD MAR, 21,1905.

I A. A., F. '& LONGUEMARB.

GARBURETER FOR HYDROCARBON ENGINES.

AIPIQIOATION FILED MAR.4,1904.

2 SHEETS-SHEET 1-.

No. 785,622. PATENTED MAR. 21,1905. A. A., F. & G. LONGUBMARE..

OARBURETER FOR HYDROOARBON ENGINES.

APPLIOATION FILED MAR.4,1904.

' 2 sums-sum z.

UNITED STAT S Patented March 21, 1905.

PATENT OFFICE.

AMELlE ADELE ONGUEMAEE, FERNAND LONGUEMARE, AN eEoReEs LONGUEMARE, or PARIS, FRANCE, ASSIGNORS 'ro SAID AMELIE ADELE LONGUEM ARE.

CARBURETER FOR HYDROCARBON-ENGINES.

SPECIFICATION forming part of Letters Patent No. 785,622, dated March 21, 1905.

Application filed March 4,1904. Serial No. 196,632.

To all whom, it may concern.-

Be it known that we, AMELIE ADELE LONGUEMARE, EERNAND LONGUEMARE, and GEORGEs LONGUEMARE, citizens of the French 5 Republic, residing in Paris, France, have invented certain new and useful Improvements in Carburetors for Hydrocarbon-Engines, of which the following is a specification.

This invention relates to an apparatus for I the partial automatic regulation of the admission of air to the carbureter of an explosionengine, the regulation in question being such that a variable supplementary volume of air, the proportion of which varies directly with the speed of the engine, is added to the volume of air admitted through an orifice of constant cross-section, which, however, is smaller than that of the suction-pipe of the engine.

In the accompanying drawings, Figure l shows a plan view of a carburetor, the airregulating device being shown in section; and Fig. 2, a side elevation, partly in section, of the same.

The apparatus consists of a tube or casing 5 (0, provided with abranch 6, which is'connected to the ordinary device 0, serving for the admission of air to the carbureter-cllamher. One of the ends of the casing (0* namely, the end Zis open, and the cross-sec- 3 tional area of that opening (Z is smaller than that of the branch 6. At the other end, 6, of

the casing to is arranged a two-cone tube f.

The reduced portion of the cone f alfords a seat for a valve g, constituted by a disk moving on a central rod h, which forms a guide for it.

A spring 9, concentrically arranged on the rod it, serves to maintain the valve g applied to its seat, and consequently to cut off the pas- 4 sage to air through the cone. The adjustment of the tension of the spring 9' may be effected by screwing the rod it up or down in the spider 27, through which it is mounted.

When the engine is running slowly, the air entering the carburetor passes only through the opening (Z of the casing a, the valve 9 remaining on its seat. If, however, the engine exceeds a certain speed, the frequency of the suctions of its piston produces a greater depression through the branch 6, which depression tends to open the valve 9, whereupon an additional volume of air enters through said valve.

It will be seen that owing to the conical form of the casing of the valve 9 the area of the passage for the admission of an additional volume of air gradually increases as the extent of opening of the valve increases, so that the supply of air to the carbureter is the greater the greater the speed of the engine.

What we claim as our invention, and desire to secure by Letters Patent, is

1. An automatically-acting air-inlet device for carbureters comprising a three-way tubular connection comprising a normal air-inlet opening, an auxiliary automatically-adjustable air-inlet opening, a valve therein and an intermediate air-inlet conduit leading to the carbureting-chamber, substantially as set forth. 7o

2. In an automatically-acting air-inlet device for carbureters a threeway connection comprising a normal air-inlet opening, an auxiliary automatically adjustable air inlet opening, a valve therein, and an intermediate air-inlet conduit leading to the carburetingchamber of slightly-larger area than the normal air-inlet opening, substantiall' as set forth.

3. In an automatically-acting air-inlet device for carbureters a three-way connection comprising a normal air-inlet opening (Z, an auxiliary automaticallyadjustable air-inlet opening a, a valve therein, and an intermediate air-inlet conduit Z) leading to the carbu reter-chamber of slightly larger area than the normal air-inlet opening, substantially as described.

4. In an automatically-acting air-inlet device for carbureters a three-way connection 9 comprising a normal air-inlet opening, an auxiliary automatically conical adjustable airinlet opening, a valve therein, and an intermediate air-inlet conduit leading to the carbureting-chamber of slightly-larger area than the normal air-inlet opening, substantially as set forth.

5. Apparatus for the automatic regulation of the air-supply to a carbureter comprising a three-way casing, a conical valve-casing in one opening thereof, a valve therein, a springvalve mounted thereon and means for regulating the tension of the valve-spring, substantially as set forth.

6. Apparatus for the automatic regulation of the air-supply to a carbureter comprising a three-Way casing a, a conical valve-casing f 

